4.9.4. Total Soluble Solids (TSS)

The TSS of the control and treated fruits were estimated using a refractometer (A87117, Bellingham, UK) with a precision of ±0.1%. Distilled water was used to calibrate the refractometer. Two drops of fruit juice were placed on the refractometer prism, and the measurements were taken again. This procedure was repeated three times for each fruit sample, and the prism was cleaned with ethanol after each measurement.

**Author Contributions:** S.A.A.-H.: conceptualization, methodology, validation, investigation, and writing—original draft, review, and editing. R.M.A.-A., O.T.A.-I., and N.K.: formal analysis, conceptualization, investigation, software, and data curation. V.A., S.P., and A.T.P.: writing—editing and reviewing. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Data are available on request from the authors.

**Acknowledgments:** The authors are grateful to the Agriculture college of Basrah University for their infrastructural support.

**Conflicts of Interest:** The authors declare no conflict of interest.
